The US experience with shale oil and shale gas offers a number of lessons to the rest of the world. Lessons that suggest, amongst other things, that UK onshore unconventionals will be tough to deliver.
Lesson #1 seems to be that the best ‘candidate shales' are those that have acted as the source rock for a significant, even major, conventional petroleum province. In fact it is very rare that this is not the case.
If we look in our ‘neighborhood' – Western Europe, Russia and the FSU, and North Africa – the obvious candidates therefore appear to be the Kimmeridge Clay, the Bazenhov, the Domanik, and the ‘hot shale' of North Africa,
Lesson #2 is that the economics work best (or at current oil prices, only work) when you are in the “sweet spot”. The “sweet spots” of plays such as the Barnet, the Bakken, some of the Permian Basin are now clear, after much effort.
Visit source site